Sigma C master clock

Bodet Sigma C - Central Time and Automation Controller with Friendly Bell Tone Support, 110-230V, 19" Rack

The Bodet Sigma C is an advanced central controller designed for managing time synchronization, relay circuits, and audio systems within network infrastructures. With 110-230V power supply and a 19" rack-mountable 1U housing, it is ideal for professional installations in schools, industrial sites, offices, and public buildings.

The device allows programming and control of up to three independent relay circuits, which can be used to manage bells, lighting, heating, air conditioning, alarms, or access control. Notably, Sigma C supports friendly bell tones, replacing traditional loud signals with pleasant, non-disruptive sounds - an increasingly popular feature in educational environments where acoustic comfort matters.

Time synchronization is achieved via NTP or antennas using ALS, DCF, GPS, GLONASS, or Galileo. Sigma C automatically adjusts for daylight saving time and restores synchronization after power outages.

With a built-in LCD display, Ethernet interface, and support for NTP, SNMP, DHCP, and SMTP protocols, the unit offers full control and integration with building management systems. Expandability via two optional cards makes it a flexible and scalable solution.

Functionality

• Time synchronization via NTP, GPS, DCF, GLONASS, Galileo, or ALS
• Programming of 3 independent relay circuits (e.g., bells, HVAC, lighting)
• Friendly bell tone support for educational environments
• Weekly, holiday, and special scheduling
• Automatic daylight saving time adjustment
• Remote programming via PC software and Ethernet
• Flash memory settings storage and battery-backed clock
• Protocols supported: NTP (v2-v4), SNMP v2c, DHCP, SMTP
• LED indicators: power, alarm
• Expandable with 2 optional cards

Technical Specifications

• Power supply: 100-240V AC, 0.8-0.55A
• Housing: aluminum, 19" rack, 1U height
• LCD display: 2 lines x 24 characters, backlit
• Accuracy: ±0.1 s/day (TCXO), up to 2ms with GPS
• 3 relays: 1A / 240V
• Operating temperature: 0°C to +50°C
• Protection rating: IP41
• Mounting: 19" rack or wall (ABS version)
• Compliance: LVD 2014/35/EU, EMC 2014/30/EU, NFC 90002, NFS 87500A/C

Bodet Sigma C is a reliable and scalable time and automation control center, offering precise synchronization, flexible relay management - including friendly bell tone support - and seamless integration with modern building systems.